Home Alzheimer's disease Where Alzheimer’s disease is rising fast in the U.S.

Where Alzheimer’s disease is rising fast in the U.S.

Credit: Unsplash+

A new study has taken a close look at where Alzheimer’s disease is most common across the United States, and the results show a clear pattern.

The East and Southeast parts of the country have the highest number of people living with this serious memory condition. This discovery helps experts better understand who is most affected and where more support is needed.

Alzheimer’s disease is a condition that slowly damages the brain. It affects memory, thinking, and behavior. Over time, people may forget important things, have trouble speaking, and struggle with daily tasks. It is the most common form of dementia and mainly affects older adults.

In this new study, researchers examined data from all 3,142 counties in the United States. This makes it one of the most detailed studies ever done on this topic. The team used information from the Chicago Health and Aging Project, along with population data from the U.S. government, to estimate how many people in each area are living with Alzheimer’s.

The results showed that some counties have much higher rates than others. For example, Miami-Dade County in Florida, Baltimore City in Maryland, and the Bronx in New York had some of the highest numbers.

In these places, about 16.6% of older adults were living with Alzheimer’s. Other areas with high rates included Prince George’s County in Maryland, Hinds County in Mississippi, and Orleans Parish in Louisiana. Several counties in California and Texas also appeared on the list.

These areas are sometimes called “Alzheimer’s hotspots.” They are places where many people are living with the disease, and where health services may be under more pressure. Knowing where these hotspots are can help governments and health organizations decide where to send more funding, staff, and support programs.

One of the main reasons for these patterns is age. Alzheimer’s mainly affects older adults, so areas with more elderly people will naturally have more cases. However, the study also found that race and ethnicity play an important role.

Older Black Americans are about twice as likely to develop Alzheimer’s compared to older white Americans. Older Hispanic adults are also at higher risk, about one and a half times more likely than white adults of the same age.

This does not mean that race alone causes the disease. Instead, it shows that many factors work together. These may include access to healthcare, education, income, lifestyle, and long-term stress. All of these can affect brain health over time.

The number of people living with Alzheimer’s in the United States is already very high. Around 6.7 million Americans currently have the disease. Experts expect this number to grow as the population gets older. In particular, the West and Southwest regions are expected to see the fastest increase in cases in the next few years.

This growing number will put pressure on healthcare systems. More doctors, nurses, and caregivers will be needed to support people living with Alzheimer’s. Families will also need more help, as caring for someone with this condition can be very challenging.

Understanding where Alzheimer’s is most common can help with planning for the future. Health officials can use this information to build better support systems, train more workers, and create programs that meet the needs of different communities. For example, services may need to be designed in ways that respect different cultures and languages.

The study was presented at the Alzheimer’s Association International Conference in Amsterdam and published in the journal Alzheimer’s & Dementia. These findings give researchers, healthcare workers, and policymakers a clearer picture of how Alzheimer’s is spread across the country.

By focusing on the areas that are most affected, it is possible to improve care and support for millions of people. This can help not only those living with Alzheimer’s, but also their families and communities.

If you care about Alzheimer’s disease, please read studies that bad lifestyle habits can cause Alzheimer’s disease, and strawberries can be good defence against Alzheimer’s.

For more information about brain health, please see recent studies that oral cannabis extract may help reduce Alzheimer’s symptoms, and Vitamin E may help prevent Parkinson’s disease.

Copyright © 2026 Knowridge Science Report. All rights reserved.